import React, { Component } from 'react'
import { graphql, gql } from 'react-apollo'
import { ALL_ITEMS_QUERY, CREATE_LINK_MUTATION } from '../queries';

class CreateLink extends Component {

  state = {
    description: '',
    title: '',
    image: '',
    price: 0,
    fullPrice: 0,
    loading: false
  }

  componentWillReceiveProps(nextProps) {
    console.log(nextProps);
  }

  uploadFile = async (e) => {
    const files = e.currentTarget.files;

    let data = new FormData();
    data.append('data', files[0]);

    // use the file endpoint
    const res = await fetch('https://api.graph.cool/file/v1/cj5xz8szs28930145gct82bdj', {
      method: 'POST',
      body: data
    });
    const file = await res.json();
    console.log(file);
    this.setState({ image: file.id });
  }

  render() {
    return (
      <div>
        { this.state.loading ? 'LOADING...' : 'Ready!' }
        <form onSubmit={this._createLink}>
          <p>
            Image
            <input onChange={this.uploadFile} type='file'/>
          </p>
          <p>Title
            <input value={this.state.title} onChange={(e) => this.setState({ title: e.target.value })} type='text' placeholder='A description for the link'/>
          </p>
          <label>Price<input type="number" min="0" value={this.state.price} onChange={(e) => this.setState({ price: e.target.value })} /></label>
          <textarea
            value={this.state.description}
            onChange={(e) => this.setState({ description: e.target.value })}
            type='text'
            placeholder='The desc for this item'
          ></textarea>
          <button type="submit">Submit</button>
        </form>
      </div>
    )
  }

  _createLink = async (e) => {
    e.preventDefault();
    // pull the values from state
    const { description, title, image, price, fullPrice } = this.state;
    // create a mutation
    // TODO: handle any errors
    // turn loading on
    this.setState({ loading: true });
    const res = await this.props.createLinkMutation({
      // pass in those variables from state
      variables: {
        description,
        title,
        price: parseInt(price),
        fullPrice,
        imageId: image
      }
    });
    this.setState({ loading: false });
  }
}
// When we submit this mutation, we need to update our store - we have a few ways to do that:
// One - we can go nucular and run refetchQueries() which will just go get everything - this is easy, but at the cost of efficiency.


export default graphql(CREATE_LINK_MUTATION, { name: 'createLinkMutation', options: {
    // Easy, but slow
    // refetchQueries: ['AllLinksQuery']
    // This is much Better / efficient
    // Notice how the variable is called createItem - that is because createItem is the name of the query!
    update: (proxy, { data: { createItem } }) => {
      console.log({createItem, ALL_ITEMS_QUERY});
      const data = proxy.readQuery({ query: ALL_ITEMS_QUERY });
      // data is our store, allItems is our sub-"state", it's just an array. We can just add it to
      data.allItems.unshift(createItem);
      // and then "set state", so it will update on the page. This will update the cache for us!
      proxy.writeQuery({ query: ALL_ITEMS_QUERY, data });
    },
  } })(CreateLink)